"The Commonwealth of Oceana" is a political treatise and imaginary project of the state written by the English politician and philosopher James Herrington in 1656. In the book, the author proposes a new management model based on the idea of a republican form of government with the distribution of power between different classes of society. Harrington uses the analogy of oceanic islands to describe his imaginary state, where the political structure should be based on the principles of justice, equality and accountability to the people. It examines various aspects of governance, including the electoral system, the legislative process, and mechanisms to prevent authoritarianism. The book "Commonwealth of Oceania" is an important part of the political literature and philosophy of the 17th century, which contributed to the formation of the concepts of republicanism and the distribution of power in the state. Herrington's work played a significant role in the further development of democratic ideals and constitutional principles.